Method of forming car wheels



F. B. BELL METHOD OF FORMING CAR WHEELS Filed Sept. 26, 1925 r 2 Sheets-Sheet 1 midda Novi 24, 1031 uNrrEn STATES PATENT OFFICE I sham! n. or mrsnnasn, rmsnvnma, assrenon 'ro nnsnwa'rna sonarcomm, or rrr'rsnnnsn, rmmsnvsmn, A oonroaarron or rnmrsnvsnra men or roams can WHEELS Application fled September 28, 1825. Serial No. 58,72.

his invention relates in general to wheels, and moreparticularly to wheels of the dished t adapted for use on railway cars and the like, and has for an object the provision of 5 such a device that will'be free from internal strains, such as may cause breakage of the wheel under operating conditions and temraturea. In wheels of this type provided eretofore, the dished portion has been is formed by pressing the hub and some of the metal of thedished portion to one side to form the dish, and in form' the dish after this fashion, various unequal internal strains are set up in the metal as. an incident to the operation; 'These strains at times approach var closel to the limit of the strength of the metal and produce faulty wheels, which, when put into service will crack or break at the mt of strain. In wheels formed in acso cor ance with this invention, such strains are" not present and, therefore, this breakage does not, occur and a stronger wheel is produced havinggreater lasting 0gualities.

- Another important ject is to-pr'ovidea 245 method of "forming such a device that will eliminate or reduce unequal internal strains. 7 Numerous other'objects and advantage of the invention will be a parent as it is tter understood from the ollowin description, which, taken in connection wi the accoman' draw sdiselosesa referredem-' twi g wheel, andthe whee t thereo I p v Referri tothe Figurejlisaplan view ustratmgamethed .0 forming .a wheel in accordance with m invention; "f" j I {Figure 2 is a" section taken substantially on line 2-21of 1 showing a. wheel at the beginning oft erolling operation; as I f igure 3 isa similar view showing the wheel finished; a

Figure 4; is a view of a wheel blockfor formmgfthe wheel; i

Fi e' 5- is a sectional view Of fl forging is die si d wing a wheel after the firstvforging operation;

Figure 6 is a sectional-view of a wheel as further formed; and

v Figure 7 is a similar view of a wheel fully 52 formed. v t

I have shown on the drawings various steps for producing a wheel in accordance with my invention.

Figure 4 indicates a metal block before any ofiierations are performed. Figure 5 shows 3 t e block 11 after a preliminary forging oporation and in position between forging dies 16 and 17. Figure 6 discloses the same block as further formed and in fully formed\con-- dition except that a hub portion 13 of the a wheel and a web portion 14 may be pressed in a reversed direction to the position shown in dotted lines to eliminate strains in the web ortion 14 such as mav-be causedin the preimina forgin operation. While it is not by essentia that ,t e preliminary dishing be accomplished in the first forging operation, it is preferable to dish the blank at this 0 oration. The forging dies 16 and 17 may mounted in any suitable press. and a center- 3. ing pin 18 is preferablv provided in these dies to central y locate the blank. a

While forming rolls of any suitable shape may used, I ave shown (Figures 1 and 2) the wheel blank 15 clam d between a plu- 7i rality of idler formin i0 21' and a drivin and forming roll 22 o a rolling machine an a pair of oppositely disposed forming rolls 23 which may be suitably supported and controlled by shafts 24, the rolls 21- and 22 being an adapted to form the eriphery or tread of a 23 bei ada ted to extend the rim to form the si e an inner portions thereof andto form a further dished web portion to'produce a finished dished 5 wheel 25 (Figure 3:)eof larger diameter. Dishin the web yond the operative position an then returning it to operative position to equalize internal strains as above V described may be accomplishedin any suitable manner such as above described or by pressing beyond and rolling back to o rative position, or by rolling belyfind and ack to e I i operative osition, or the I The pre erred manner of carrying out the Ii new and improved rocess here sought to be patented is to coin ;1 etc the rolling of the car wheel with a dis more than desired in the finished wheel and thereafter reducing the amount of'this dish in the usual dishing 19;)

and hub centering press heretofore well known to all skilled in the art This manner of practicing the process is fully apparent,

it is believed, from the foregoing.

It is thought that the inventionand many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1; A method of forming dished car wheels, which consists in forming a wheel having a web portion and bendin said web portion first in one direction an then in a reverse direction to dish form.

2. A method of forming dished car wheels, which consists in forming a wheel blank having a hub portion, a rim portion and a dished web portion connecting said hub and said rim portions, and rolling said wheel blank into a wheel of similar form of a larger diameter and to var the dished web portion.

3. A method of orming dished car wheels, which consists in forging a wheel blank havingba hub portion, a rim portion and a dished we portion connecting said hub and rim portions and havinqa greater convexity than the finished wheel, and rolling said wheel blank into a finished wheel by, forming a flang'e and tyre from said rim portion and reducing the convexity of said web portion "in order to minimize the stresses caused by forming the dished web in the blank.

4. A method of formin car wheels, which comprises rolling a car w eel to final-diameter and with a dished web part connecting the hub and rim, the dish of which is greater than that desired in the finished wheel, and thereafter reducing the dish of said web part.

5. The method of forming dished car wheels, which comprises formin a car wheel with a dished portion distorted rom its nor mal dished contour in the finished wheel, and thereafter by a further wheel forming operation restoring the dished portion of the wheel to its normal contour.

FRANK B. BELL. 

